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I have code that compiles on the GNUARM compiler, but Visual Studio 2010 issues errors. The issue involves declaring variables after the first statement in a C language file: main.c #include <stdio.h> #include <stdlib.h> int main(void) { int i = 6; i = i + 1; printf("Value of i is: %d\n", i); int j = i * 10; // <-- This is what Visual Studio 2010 complains about. printf("Value of j is: %d\n", j); return EXIT_SUCCESS; } The following code compiles without errors: #include <stdio.h> #include <stdlib.h> int main(void) { int i = 6; int j; // <-- Declaration is now here, valid according to K&R rules. i = i + 1; printf("Value of i is: %d\n", i); j = i * 10; // <-- Moved declaration of j to above. printf("Value of j is: %d\n", j); return EXIT_SUCCESS; } I'm using default settings for creating a Win32 console project. When I set "Compile as" property to "Compile as C++ (/TP)", I get compilation errors in some Visual Studio header files. (Right click on project, choose Properties → Configuration Properties → C/C++ → Advanced ). How do I tell Visual Studio 2010 to allow variable declarations after the first statement, like C++ or the current C language standard?

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